200909930 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種散射模組及包含此散熱模組之背光模組，更 詳細來說’係關於一種可使背光模組的亮度更為均勻，而不會在 顯示面板上出現亮暗分佈不均之散射模組結構。 【先前技術】 液晶顯示器是利用液晶而發展出的全彩顯示技術之顯示裝置， 由於具有省電、韓射低、不占空間、重量輕等優點，且在財大 小方面擁有相當的彈性，因此在數位相機、個人數位助理(㈣嶋】 digital assistant，PDA)及電視機等具顯示螢幕之電子產品上，都可 以看到液晶顯示器之應用。另-方面，液晶顯示器與傳統陰極射 線管顯示裝置不同在於：液晶顯示器之液晶本身並不會發光，所 =需要額外的光源才能成像於勞幕…般來說，此額外的光源便 稱為背光模組。 背光模組可依光源位置之不同而分為側光式㈣弘__以㈣ 與直下式（direct Hghting type)，纟中採用直下式設置光源係為大尺 寸背光模組中最常使用的方式之―。直下式f光模組包含了多個 光源裝置與光賴H光«置提供⑽，㈣光學膜片調整 後，光線便送至彩色遽光片以於顯示面板上進行顯示。一般而言， 先學膜片組通常包含—層或數層增亮膜、擴散片、擴散板及反射 板。擴散板下方分佈了複數個網點，使光線照射至網點時，部分 、Ά會穿透網點，而另—部分光線則會由網點反射，藉由半反射 200909930 之光線可增加光線在擴散板及背板間反射次數，而半穿透之光線 則用以避免網點上方出現暗帶，進一步提高出射光束之均勻性， 進而強化背光模組之整體性能。 如第1圖之剖面圖所示，習知背光模組丨包含光學膜片組及複 數個光源1卜光學膜片組中由上而下分別為—增亮膜lG、一擴散 片12、一擴散板14及一反射板16 ;而複數個光源u則設於反射 板16上。舉例而言，光源可為發光二極體（丨匕以出〇如, LED)。由光源、n投射之光線集中於其正前方，在穿過擴散板之 7C度分佈不平均的情況下’顯示面板容易於各錢間出現格狀亮 暗紋甚或格狀亮暗點之現象12圖便為採用背光模組丨之顯示 面板上壳度分佈的模擬結果。很明顯地，顯示面板會於LED光源 間出現暗區之現象（如橢圓處所示）。此外，現今直下式架構之背光 模組中，為降低成本，常採用減少光源數量的方式來達成；而當 光源數量減少時，將使得格狀暗紋之現象更為明顯。 是故，為減緩格狀暗紋之現象，業界便提出一種背光模組，其 剖面圖係如第3圖所示。背光模組3係於擴散片下方增設網點， 以使光源產生之光線均勻散射。是故，背光模組3之光學膜片組 包含了-增亮膜3G、-擴散片32、—擴散板34、複數個網點31 及一反射板36。複數個光源33 (譬如LED)係設於反射板％上， 而網點31則設於擴散板34之下表面。更詳細而言，複數個網點 31係以光源33之發光中心點投影至擴散板34所對應的點，作為 佈置之中心、點，透過調整網點或網點間距之大小而隨著遠離中心 點減少網點31的線性密度，藉由網點31使光線散射，俾能讓光 200909930 源33之亮度重新分佈，減少因光源亮度不均而發生格狀暗紋之現 象。 然而’上述習知結構之網點分佈方式僅考慮同一水平或垂直車由 線間光源的相對關係，Μ略對角線方向才是各光源間之最大距 離’使得水平或垂直軸線間的線性密度大於對㈣㈣性密度。 因此’當光源間距及光源與擴散板之距離拉大至某—程度時，馨 如以LED為光源時’光源間距為26〜27公釐—，⑽光源與擴 散板之距離為20mm，根撼訾龄彻抬„ 很媒貫驗與模擬結果可得如第4圖所示之透 光度模擬圖。觀察此圖可知，热从、 ,、 圖了知雖然網點之設置減緩了格狀暗紋， 卻仍會在四顆LED光源之間出現暗區之情況(如橢圓處所示卜 因此，業界急需設計出-種新的網點分佈結構，使網點之線性 饮度可平均分散光源於顯示面板之透光度，並減少亮暗分佈 勻之發生。 【發明内容】 本發明之一目的在於接供一接田从 ’、種用於—♦光模組之散射模組。此 種彦光模組包含複數個光源，兮笙 ^ °亥4先源设置於散射模組之一側， 且包令 苐一光源、一第二朵、、择游墙一 皆. 一先/原/、一第三光源。第二光源係位於 一源、之-第-方向上，且第一光源與第二光源沿第一方向定 義出-第-間距。第三光源係位於第—光源之—第二方向上，且 弟一光源與第三光源沿第二方向 義出苐一間距。第一間距係 小於第一間距，且第一方向 第向，且第一方向實質上200909930 IX. Description of the Invention: [Technical Field] The present invention relates to a scattering module and a backlight module including the same, and in more detail, relates to a method for making the brightness of the backlight module more uniform The scattering module structure with uneven distribution of light and dark appears on the display panel. [Prior Art] A liquid crystal display is a display device of a full-color display technology developed by using a liquid crystal. Since it has the advantages of power saving, low Han shot, no space occupation, light weight, and the like, and has considerable flexibility in terms of wealth, The use of liquid crystal displays can be seen on electronic products such as digital cameras, personal digital assistants (PDAs) and digital display devices (PDAs) and televisions with display screens. On the other hand, the liquid crystal display differs from the conventional cathode ray tube display device in that the liquid crystal display itself does not emit light, and an additional light source is required to be imaged on the screen. In general, this additional light source is called a backlight. Module. The backlight module can be divided into side light type according to the position of the light source (4) Hong __ to (4) and direct Hghting type, and the light source is used as the most commonly used method in the large size backlight module. -. The direct-type f-light module includes a plurality of light source devices and a light source, and the light is sent to the color light sheet for display on the display panel. In general, the first film set usually includes a layer or a plurality of brightness enhancing films, a diffusion sheet, a diffusion plate, and a reflecting plate. A plurality of dots are distributed under the diffuser plate, so that when the light is irradiated to the dot, part and the ridge will penetrate the dot, and the other part of the light will be reflected by the dot, and the light of the half-reflected 200909930 can increase the light on the diffuser and the back. The number of reflections between the plates, and the semi-transparent light is used to avoid dark bands above the dots, further improving the uniformity of the outgoing beams, thereby enhancing the overall performance of the backlight module. As shown in the cross-sectional view of FIG. 1 , the conventional backlight module includes an optical film group and a plurality of light sources. The optical film group is a brightness enhancement film lG, a diffusion film 12, and a light film group. The diffusing plate 14 and a reflecting plate 16 are provided, and a plurality of light sources u are disposed on the reflecting plate 16. For example, the light source can be a light emitting diode (for example, an LED). The light projected by the light source and n is concentrated in front of it, and in the case where the 7C degree distribution through the diffusing plate is unevenly distributed, the display panel is easy to appear as a bright and dark pattern or even a dark and dark point between the money. The figure shows the simulation results of the shell distribution on the display panel using the backlight module. Obviously, the display panel will appear dark areas between the LED sources (as shown by the ellipse). In addition, in today's direct-lit backlight modules, in order to reduce the cost, it is often achieved by reducing the number of light sources; and when the number of light sources is reduced, the phenomenon of lattice-like dark lines is more obvious. Therefore, in order to alleviate the phenomenon of lattice dark lines, the industry has proposed a backlight module, the cross-sectional view of which is shown in Figure 3. The backlight module 3 is provided with a dot under the diffusion sheet to uniformly scatter the light generated by the light source. Therefore, the optical film group of the backlight module 3 includes a brightness enhancement film 3G, a diffusion sheet 32, a diffusion plate 34, a plurality of dots 31, and a reflection plate 36. A plurality of light sources 33 (such as LEDs) are disposed on the reflecting plate %, and the half dots 31 are disposed on the lower surface of the diffusing plate 34. In more detail, the plurality of dots 31 are projected by the center point of the light source 33 to the point corresponding to the diffuser plate 34 as the center and the point of the arrangement, and the dot is reduced from the center point by adjusting the size of the dot or the dot pitch. The linear density of 31, which is scattered by the dots 31, allows the brightness of the light source 30909930 source 33 to be redistributed, thereby reducing the phenomenon of lattice dark lines due to uneven brightness of the light source. However, the distribution of the dot structure of the above-mentioned conventional structure only considers the relative relationship of the light source between the lines of the same horizontal or vertical vehicle, and the diagonal direction is the maximum distance between the light sources' such that the linear density between the horizontal or vertical axes is greater than (4) (four) sex density. Therefore, when the distance between the light source and the distance between the light source and the diffuser plate is increased to a certain degree, the distance between the light source and the diffusing plate is 20 mm when the LED is used as the light source, and the distance between the light source and the diffusing plate is 20 mm. The age of the 訾 彻 „ 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很 很However, there will still be dark areas between the four LED light sources (such as the ellipse). Therefore, the industry urgently needs to design a new dot distribution structure, so that the linear drinking degree of the dots can evenly distribute the light source to the display panel. The light transmittance is reduced, and the occurrence of light and dark distribution is reduced. SUMMARY OF THE INVENTION One object of the present invention is to provide a scattering module for use in a light source module. Including a plurality of light sources, 兮笙 ^ ° Hai 4 source is set on one side of the scattering module, and the package is a light source, a second flower, and a wall of choice. One first / original /, one third a light source, the second light source is located in a source, the first direction, and the first light source The light source defines a -first spacing in the first direction. The third light source is located in the second direction of the first light source, and the first light source and the third light source are spaced apart in the second direction. The first spacing is less than a first pitch, and the first direction is the first direction, and the first direction is substantially
不垂直於第二方向。本發明 I 牧政料組包含複數個散射元件，該 等政射7L件於平行第一方向I篦- ，、第一方向上，分別構成一第一線性 200909930 排列饴度與一第二線性排列密度d第一線性排列密度係小於第二 ⑴排職度’藉此相使背光模組之光線均勻投射於顯示面板 而不產生亮暗分佈不均勻的效果。 、本發明之另-目的在於提供—種背光模組，此種f光模組包含 複數個光源與如前所述之散射模組。該等光源設置於散射模組之 -側’且包含-第一光源、一第二光源與一第三光源。第二光源 係㈣第-光源之-第_方向上，且第—光源與第二光源沿第一 方向定義出一第-間距。第三光源係位於第-光源之一第二方向 第光源與第二光源沿第二方向定義出一第二間距。第一 間距係小於第二間距，且第一方向不同於第二方向，且第一方向 實貝上不垂直於第二方向。散射模組包含複數個散射元件，該等 散射7L件於平订第—方向與第二方向上，分別構成—第一線性排 列密度與-第二線性排列密度。其中，第一線性排列密度係小於 第二線性排列密度’藉此達到使背光模組之光線均勻投射於顯示 面板而不產生亮暗分佈不均勻的效果。 在參閱圖式及隨後描述之實施方式後，具有本發明所屬技術領 域之通常知識者便可瞭解本發日狀目的，錢本發日狀技術手段 及實施態樣。 【實施方式】 本發明之第一實施例係為—種背光模組5，其剖面圖係如第5 圖所示。背光模組5係自上而下包含一增亮膜(bright賴 enhancement film，BEF)5〇、_擴散片（ sheet，⑽炽、一擴 散板（diffuser plate，DP)54、—散射模組5卜複數個光源53及一反 200909930 射板(refleCt〇r)56。散射模組51包含複數個散射元件。於本實施例 中’複數個散射70件即為複數個網點51a，其係設置於擴散板Μ 之下，而複數個光源53為發光二極體，其相對於散射元件而設置 於反射板56之上；換言之，複數個光源53係設於散射模組51之 一側。 背光模組5之反射板56及光源53之俯視圖係如第6圖所示， 其中複數個光源53包含了一第一光源53〇、一第二光源说與一 第三光源534。第二光源532係位於第一光源53〇之—第一方向 531上’且其間定義出—第一間距&。第三光源534則位於第一光 源530之一第二方向533上，且其間定義出一第二間距b。需注音 2是’第-方向别與第二方向533並不相同，且第—方向531 貫質上不垂直於第二方向533。於此實施例中，第一方向別係為 垂直方向’而第—方向533則為一對角線方向，是故第—間距& 小於第二間距b。於其他實施態樣中，第一方向53i亦可為一水平 '向（惟此情況之實施例，未於圖式中表示，但應可了解）。 -背光模組5之擴散板54及該等網點51之仰視圖係、如第7圖所 丁―八:複數個網點51包含了一第一網點51〇、一第二網點犯 及一第三網點5M。於此實施例中，該等網點5i〇、5i2、514之面 積俱相等且形狀皆相同，若 , 以千仃於第—方向53i視之，該等網 〇、512、514皆為菱形。第—網點训、第二醜512及第： 網點514分別斜廄5μ — 且笛& % —先源530、第二光源532及第三光源534， 立第一網點51 〇及第-烟μ m白 及第—網點512之連線係平行於第-方向53卜沿 此連線上所經之網點構成—第—線性密度；第_網點512及第三 200909930 網點514之連線係平行於第二方向切 有-第二線性密度； ^ 4線上所經之網點具 別與第二方㈣上之-單位長^數下個網點分別於沿第-方向 位於第一方向531上單位县碎 下，網點所佔之尺寸長度。 上早位長度c内之所有網點 積，位於第二方向533上罝 百第—總面 她而接# 轉長度c内之所有網點共具有-第_ 〜面積，第—總面 第一 相同面積，故可推知第一方j3r：： 由於各個網點具有 方6s ° 上之第一線性密度係小於第一 方向533上之第二線性密声 弟一 534㈣& 在度减，便可使該等光源530、532、 之光線1由第二方向533上較大之網點面積，加強今 射而更平均地分佈於顯示面板上。 加強放 知用本實_之背域組的顯示裝置， 光度模擬圖係如第8 j田攸上呈現之透 圖所不，由於網點排列之方式不同，而佶科 角線方向之網點線性密戶 子 4度^避免造成亮暗分佈不均勻之情 / °此’即便增加各光源之間距，仍可供給 此背光模組之顯示震置的顯示面板上。 切至知用 再次參考第7圖’若以不同方式觀之，於第-方向531上，第 -網點5H)與第二網點512可視為菱形網點之排列；且於第j ^ it上，第一網點510與第三網點514可視為正方形網點之排 1。於不同方向上的不同網點形狀排列，可增加第二方向533 上_點排職度’因此第—方向531上的菱形網轉列㈣之 第^線性密度，便可小於第二方向533上的正方形網點排列所得 之第-線性密度’藉以均句光線、避免亮暗分佈不均勻發生。 第一實施例於其他較佳實施態樣中’該等網點之面積可因應距 10 200909930 ，各網點之面積可調整設計 ，是故延伸至二光源之間中 °亥·#光源之排列形式亦不限 輕易推及其他排列形式或隨 離光源之遠近而有所不同。舉例而言 為隨著距離光源愈遠，網點面積愈小 央處之網點面積為最小；另一方面， 於矩陣式排列，熟習此項技術者亦可 機分佈之實施態樣。 本發明之第二實施例亦為一種背光模組，不同的是，此背光模 、且之政射&組51具有異於前述各實施例之散射元件。背光模组之 擴散板54及該等散射元件川’之仰視圖係如第9圖，如圖所示， 散親組51，之各個散射元件51a，之面積俱相等且形狀皆為圓 。政射兀件包含-第一網點51〇，、一第二網點512，及一 點5H，’此三者分別對應至第一光源53〇、第二光源切及^ 先源534。第-網點训，及第二網點512，之連線係平行於第一方 ㈣卜於此第一方向531上之各網點具有—第一距離X,亦即第 训與第二網點512，間之距離等於第—輯χ。第一網點 點514,之連線係平行於第二方向533,於此第二方向 533上之各，職具有—第二距離y，亦即第一網點HQ， 514’間之距離等於筐_花她 丄 步一、礼點 、弟—距離y°由於第—距離X係大於該第二距離 y’藉此便可使該等光源於第二方向533上所發出之光，藉由 密設置之網點而加強散射效果，勻化光線’進—步〆 分佈不均勻。 “哨 第二實施例於其他較佳實施態樣中，該等網點之面積亦可因應 距離光源之遠近而有所不同。舉， " 、 ί ηη 0 各、·，同點之面積可調整言史 計為隨著距離光源愈遠，糰點 ° υ通，·面積愈小，是故延伸至二光源之間 200909930 中央處之網點面積為最小；另_方面，該等光源之排抑式亦不 限於矩陣式排列，熟習此項技術者亦可輕易推及其他排歹二或 隨機分佈之實施態樣。 ，外上所述，本發明係提出對角線方向線性密度大於水平或垂直 方向線性密度，藉以加強較長距離間之光源散射效果，均勾光線 分布’即便因成本考量而減少光源、增加光源間距，仍不致因網 點之線性密度不足使得反射較少而產生亮暗分佈之不均勾。 上述實施例僅用來例舉本發明之實施態樣，以及閣釋本發明之 ㈣特徵’並非用來限制本發明之_。任何熟悉此技術者可輕 易凡成之改變或均等性之安排均屬於本發明所主張之範圍，本發 明之榷利範圍應以中請專利範圍為準。 【圖式簡單說明】 第1圖係為習知背光模組之示意圖； '圖係為&用第丨圖之背光模組之透光度模擬圖； 第3圖係為另一種習知背光模組之示意圖； 第4圖係為採用第3圖之背光模組之透光度模擬圖； 第5圖係為本發明背光模組第-實施例之剖面圖； 第6圖係為本發明第—實施例背光模組中，光源於反射板上之 相對關係俯視圖； 弟7圖係為本發明笛 ^ 第―貫把例背光模組中，網點於擴散板上之 相對關係仰視圖； —圖系為ϋ本發明第__實施例之背光模組之透光度模擬 12 200909930 第9圖係為本發明第二實施例背光模組中，網點於擴散板上之 相對關係仰視圖。 【主要先件符號說明】 1 :背光模組 10 :增亮膜 11 :光源 12 :擴散片 14 ·擴散板 16 :反射板 3 :背光模組 30 :增亮膜 31 :網點 32 :擴散片 3 3 :光源 34 :擴散板 36 :反射板 5 :背光模組 50 :增亮膜 51 :散射模組 51 a :網點 51’ ：散射模組 51a’ ：網點 52 :擴散片 5 3 :光源 54 :擴散板 56 :反射板 510 :第一網點 512 :第二網點 514 :第三網點 510’ ：第一網點 512’ ：第二網點 514’ ：第三網點 530 :第一光源 531 :第一方向 532 :第二光源 533 :第二方向 534 :第三光源 a:第一間距 b :第二間距 c:單位長度 X :第一距離 y·弟二距離 13Not perpendicular to the second direction. The invention has a plurality of scattering elements, wherein the political elements 7L are in a parallel first direction I 篦 - , and in a first direction, respectively constitute a first linear 200909930 arrangement twist and a second linear The first linear arrangement density of the arrangement density d is smaller than the second (1) row degree', whereby the light of the backlight module is uniformly projected on the display panel without causing uneven brightness and dark distribution. Another object of the present invention is to provide a backlight module comprising a plurality of light sources and a scattering module as described above. The light sources are disposed on the side of the scattering module and include a first light source, a second light source and a third light source. The second light source is (four) in the -th direction of the first light source, and the first light source and the second light source define a first pitch in the first direction. The third light source is located in a second direction of the first light source. The first light source and the second light source define a second pitch along the second direction. The first pitch is smaller than the second pitch, and the first direction is different from the second direction, and the first direction is not perpendicular to the second direction on the solid. The scattering module comprises a plurality of scattering elements, wherein the scattering 7L pieces are formed in the first direction and the second direction, respectively, forming a first linear array density and a second linear arrangement density. Wherein, the first linear arrangement density is smaller than the second linear arrangement density ′, thereby achieving the effect of uniformly projecting the light of the backlight module on the display panel without uneven distribution of light and dark. After referring to the drawings and the embodiments described hereinafter, those having ordinary skill in the art to which the invention pertains can understand the purpose of the present invention, and the technical means and embodiments of the present invention. [Embodiment] A first embodiment of the present invention is a backlight module 5, and a cross-sectional view thereof is shown in FIG. The backlight module 5 includes a brightness enhancement film (BEF) 5 〇, a diffusion sheet (sheet, (10) blaze, a diffuser plate (DP) 54, a scattering module 5 from top to bottom. a plurality of light sources 53 and a counter-resonation plate 92. The scattering module 51 includes a plurality of scattering elements. In the present embodiment, 'a plurality of scattering 70 pieces are a plurality of dots 51a, which are set in Below the diffusing plate ,, the plurality of light sources 53 are light emitting diodes disposed on the reflecting plate 56 with respect to the scattering elements; in other words, a plurality of light sources 53 are disposed on one side of the scattering module 51. The top view of the reflector 56 and the light source 53 of the group 5 is as shown in Fig. 6, wherein the plurality of light sources 53 comprise a first light source 53A, a second light source and a third light source 534. The second light source 532 is The first light source 53 is located on the first direction 531 and defines a first pitch & the third light source 534 is located in a second direction 533 of the first light source 530, and a second is defined therebetween. Pitch b. Need to be phonetic 2 is 'the first direction is not the same as the second direction 533, The first direction 531 is not perpendicular to the second direction 533. In this embodiment, the first direction is a vertical direction 'the first direction 533 is a diagonal direction, so the first spacing & The second direction b is smaller than the second spacing b. In other embodiments, the first direction 53i may also be a horizontal 'direction (in this case, the embodiment is not shown in the figure, but should be understood). The diffuser plate 54 of 5 and the bottom view of the mesh points 51, as shown in Fig. 7 - eight: a plurality of dots 51 include a first dot 51, a second dot and a third dot 5M. In this embodiment, the areas of the five dots 5i, 5i2, and 514 are equal and the shapes are the same. If the millimeters are in the first direction 53i, the meshes, 512, and 514 are all diamond-shaped. The network point training, the second ugly 512 and the first: the network point 514 are respectively inclined 5μ - and the flute & % - the first source 530, the second light source 532 and the third light source 534, the first mesh point 51 第 and the first smoke point μ m white And the connection of the first-point 512 is parallel to the first direction 53. The dot passing along the line constitutes a first linear density; the first dot 512 And the connection of the third 200909930 dot 514 is parallel to the second direction - the second linear density; ^ the line on the line 4 and the second side (four) - the unit length ^ the next dot respectively The first direction is located in the first direction 531, the unit count is broken, and the size of the dot occupied by the dot. All the dot products in the upper length c are located in the second direction 533, and the total face is connected to the length of the turn. All the dots in c have a total area of -the _~ area, and the first area of the first surface is the same, so the first side j3r can be inferred: Since the first linear density of each dot has a square of 6s ° is smaller than the first direction The second linear dense voice 533 on the 533 (4) & in the degree of reduction, the light source 530, 532, the light 1 from the second direction 533 on the larger dot area, strengthen the current shot and more evenly distributed On the display panel. Strengthening the display device of the back domain group of the real use, the photometric simulation system is not as shown in the 8th j-field, because the dot arrangement is different, and the dot in the direction of the corner is linearly dense. The user can avoid the uneven distribution of light and darkness / ° This can be supplied to the display panel of the display of the backlight module even if the distance between the light sources is increased. Referring again to FIG. 7 again, if viewed in a different manner, in the first direction 531, the first mesh point 5H and the second mesh point 512 can be regarded as an arrangement of diamond dots; and on the j^ it, One of the dots 510 and the third of the dots 514 can be regarded as row 1 of square dots. The arrangement of different dot shapes in different directions can increase the _point rank degree in the second direction 533. Therefore, the linear density of the diamond mesh (4) in the first direction 531 can be smaller than that in the second direction 533. The first-linear density obtained by arranging square dots is used to uniformly mean light and avoid uneven distribution of light and dark. In other preferred embodiments, the area of the dots can be adjusted according to the area of 10 200909930, and the area of each dot can be adjusted, so that the arrangement of the light source between the two light sources is also extended. It is not limited to easy to push and other arrangements or vary with the distance from the light source. For example, the farther away from the light source, the smaller the dot area is, the smaller the dot area is at the center; on the other hand, in the matrix arrangement, those skilled in the art can also distribute the implementation. The second embodiment of the present invention is also a backlight module, except that the backlight module and the ecstasy group 51 have different scattering elements from the foregoing embodiments. The bottom view of the diffuser plate 54 of the backlight module and the scattering elements is as shown in Fig. 9. As shown, each of the scattering elements 51a of the scattered group 51 has the same area and a round shape. The political element includes a first network point 51〇, a second network point 512, and a point 5H, respectively. The three are respectively corresponding to the first light source 53〇, the second light source cut, and the first source 534. The first network point training, and the second network point 512, the connection is parallel to the first party (four). The first network direction 531 has a first distance X, that is, the first training and the second network point 512. The distance is equal to the first series. The first network point 514, the connection is parallel to the second direction 533, and each of the second direction 533 has a second distance y, that is, the distance between the first network points HQ, 514' is equal to the basket _ Taking her step by step, courtesy, and brother-distance y°, because the first-distance X-system is greater than the second distance y', the light emitted by the light sources in the second direction 533 can be made by the secret setting. The dots are enhanced to enhance the scattering effect, and the homogenized light is unevenly distributed. In the other preferred embodiments, the area of the dots may be different depending on the distance from the light source. For example, " , ί ηη 0 each, ·, the area of the same point can be adjusted The history is calculated as the distance from the light source is farther, the point of the group is υ通, and the smaller the area, the smaller the area of the dot extending to the center of the 200909930 between the two light sources is the smallest; the other side, the lightening of the light source It is also not limited to the matrix arrangement. Those skilled in the art can easily push other implementations of the second or second random distribution. As described above, the present invention proposes that the linear density in the diagonal direction is greater than the horizontal or vertical direction. Linear density, in order to enhance the light source scattering effect between longer distances, even the light distribution 'even if the light source is reduced due to cost considerations, increase the distance of the light source, still not due to the lack of linear density of the dots, resulting in less reflection and light and dark distribution The above embodiments are only used to exemplify the embodiments of the present invention, and the features of the present invention are not intended to limit the present invention. Anyone familiar with the technology can easily The arrangement of the change or the equality is within the scope of the present invention, and the scope of the present invention should be based on the scope of the patent application. [Simplified Description of the Drawing] FIG. 1 is a schematic diagram of a conventional backlight module; 'The picture is the transmittance simulation diagram of the backlight module of the second figure; the third figure is a schematic diagram of another conventional backlight module; the fourth picture is the backlight module of the third figure 5 is a cross-sectional view of a backlight module according to a first embodiment of the present invention; and FIG. 6 is a plan view showing a relative relationship of a light source on a reflector in a backlight module of the first embodiment of the present invention; The figure 7 is the bottom view of the relative relationship of the dots on the diffusion plate in the backlight module of the present invention; the figure is the transmittance of the backlight module of the __ embodiment of the present invention Simulation 12 200909930 Figure 9 is a bottom view of the relative relationship of the dots on the diffusion plate in the backlight module of the second embodiment of the present invention. [Main Prefix Symbol Description] 1: Backlight Module 10: Brightness Enhancement Film 11: Light Source 12: diffuser 14 · diffuser 16 : reflector 3 : backlight module 30 : increase Bright film 31: dot 32: diffuser 3 3: light source 34: diffuser 36: reflector 5: backlight module 50: brightness enhancement film 51: scattering module 51 a: dot 51': scattering module 51a': dots 52: diffuser 5 3 : light source 54 : diffuser 56 : reflector 510 : first dot 512 : second dot 514 : third dot 510 ′ : first dot 512 ′ : second dot 514 ′ : third dot 530 The first light source 531: the first direction 532: the second light source 533: the second direction 534: the third light source a: the first pitch b: the second pitch c: the unit length X: the first distance y, the second distance 13